The second quartile also known as the median of the data divides the range in the middle and has 50 percent of the data below it that is divided the data into two equal parts.
A box and whisker plot also known as box plot tells the five-number summary of a set of data.
The five-number summary is the minimum, first quartile, median, third quartile, and maximum of the data set.
In a box plot, a box is drawn from the first quartile to the third quartile. A vertical line in the box represents the median of data.
In the given box plot:
The end point of box represents the first and the third quartile. The line in the box is the median of data set.
To estimate, round 3102 to 3100 round 1-10 to 2500 1-70 to 2100 1-80 to 2900 2900+2100+2500+3100=10600mi Yes it is reasonable because you add and subtract numbers when estimating, however it is not exact
